EMS Men's Isolation 80

Great bag, You can fit your entire life and more in it. The strong construction of the outer shell is great for back country due to its unbeatable rip stop. aside from being a whopping 80 L there enough lashing points and strap sections to add an additional 70 L to the outside of the bag.

Only downsides are the lack of padding, I feel that North Face has much better padding in the shoulders and back, and with such a large bag an air channel along the back (which North Face also specializes in) would be nice for those blistering 90 degree weeks.